2020 Science & Technology - Agriculture, Fertigation

What are the advantages of fertigation in agriculture ? 1. Controlling the alkalinity of irrigation water is possible. 2. Efficient application of Rock Phosphate and all other phosphatic fertilizers is possible. 3. Increased availability of nutrients to plants is possible. 4. Reduction in the leaching of chemical nutrients is possible. Select the correct answer using the code given below:

• 1, 2 and 3 only
• 1, 2 and 4 only
• 1, 3 and 4 only
• 2, 3 and 4 only